openat*: use a static function with the different type and strong_alias_untyped

No need for hidden openat64
_lfs_64.h does not allow to compile *64.c if LFS is not enabled, remove guard

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/fcntl.h

@@ -135,7 +135,6 @@ extern int __REDIRECT (openat, (int __fd, __const char *__file, int __oflag,
 
 extern int openat64 (int __fd, __const char *__file, int __oflag, ...)
      __nonnull ((2));
-libc_hidden_proto(openat64)
 #endif
 
 /* Create and open FILE, with mode MODE.  This takes an `int' MODE

libc/sysdeps/linux/common/openat.c

@@ -6,19 +6,13 @@
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
 
-#define openat __xx_openat
 #include <sys/syscall.h>
 #include <fcntl.h>
-#undef openat
 
 #ifdef __NR_openat
-/* The openat() prototype is varargs based, but we don't care about that
- * here, so need to provide our own dedicated signature.
- */
-extern int openat(int fd, const char *file, int oflag, mode_t mode);
-libc_hidden_proto(openat)
-
-_syscall4(int, openat, int, fd, const char *, file, int, oflag, mode_t, mode)
+# define __NR___syscall_openat __NR_openat
+static __inline__ _syscall4(int, __syscall_openat, int, fd, const char *, file, int, oflag, mode_t, mode)
+strong_alias_untyped(__syscall_openat,openat)
 libc_hidden_def(openat)
 #else
 /* should add emulation with open() and /proc/self/fd/ ... */

libc/sysdeps/linux/common/openat64.c

@@ -6,27 +6,16 @@
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
 
-#define openat64 __xx_openat
+#include <_lfs_64.h>
 #include <sys/syscall.h>
 #include <fcntl.h>
-#undef openat64
-
-#ifdef __UCLIBC_HAS_LFS__
 
 #ifdef __NR_openat
-/* The openat() prototype is varargs based, but we don't care about that
- * here, so need to provide our own dedicated signature.
- */
-extern int openat64(int fd, const char *file, int oflag, mode_t mode);
-libc_hidden_proto(openat64)
-
-int openat64(int fd, const char *file, int oflag, mode_t mode)
+static int __openat64(int fd, const char *file, int oflag, mode_t mode)
 {
 	return openat(fd, file, oflag | O_LARGEFILE, mode);
 }
-libc_hidden_def(openat64)
+strong_alias_untyped(__openat64,openat64)
 #else
 /* should add emulation with open() and /proc/self/fd/ ... */
 #endif
-
-#endif